For specific older devices or technical users, the following tools are the most recognized: Downgrade and dualboot status of almost all iOS devices
While official tools like iTunes or Finder block these restores to maintain security, a few community-driven tools attempt to bypass these restrictions for advanced users. The Reality of "Unsigned" Restores unsigned ipsw restore tool free
is the most widely used free, open-source tool for restoring unsigned firmware. Preparation Download the FutureRestore executable from its official GitHub page Download the unsigned IPSW file for your device from Locate your saved .shsh2 blobs for that version. Set the Nonce For specific older devices or technical users, the